<template>
    <div>
        <div class="navbar-box" style="min-height: 48px;">
            <!-- fixed定位后的导航栏 -->
            <div class="navbar">
                <!-- 导航栏容器 -->
                <div class="navbar-container">
                    <!-- 左侧 -->
                    <div class="navbar-container-left">

                        <!-- 网页logo -->
                        <div class="logo" @click="transIndex">
                            <img src="../assets/logo.png">
                        </div>

                        <!-- 左侧导航栏 -->
                        <ul class="left-ul">
                            <li title=""><router-link active-class="active" to="/forum"> 论坛 </router-link></li>
                            <li title=""><router-link active-class="active" to="/community"> 社区 </router-link></li>
                        </ul>

                    </div>

                    <!-- 搜索框 -->
                    <div class="navbar-container-middle">
                        <div class="navbar-search-container">
                            <input type="text" autocomplete="off" id="search">
                            <button>
                                <i></i>
                                <span>搜索</span>
                            </button>
                        </div>
                    </div>

                    <!-- 右侧 -->
                    <div class="navbar-container-right">
                        <div class="navbar-btns-User">
                            <!--用户登录: 展示用户的头像以及其他信息-->
                            <div class="userPhoto" @mouseover="mouseOver" @mouseleave="mouseLeave" v-if="isLogin">
                                <!-- 用户头像 -->
                                <a class="hasAvatar" :style="{opacity}" href="#" v-if="user">
                                    <img :src="portrait">
                                </a>
                                <!-- 用信息弹出框 初始display:none-->
                                <div class="navbar-profile"  :style="{display}"  v-if="user">
                                    <div class="profile-user">
                                        <!-- 用户简介的头像 -->
                                        <a class="profile-avatar" href="#">
                                            <img :src="portrait">
                                        </a>
                                        <p class="profile-nickName">{{ username }}</p>
                                    </div>
                                    <div class="profile-fans">
                                        <ul class="">
                                            <li><p>{{ user.fans }}</p>粉丝</li>
                                            <li><p>{{user.attention}}</p>关注</li>
                                            <li><p>{{user.good}}</p>获赞</li>
                                        </ul>
                                    </div>
                                    <div class="profile-personal">
                                        <ul>
                                            <li @click="userinfo">个人中心</li>
                                            <li>账号设置</li>
                                        </ul>
                                    </div>
                                    <div class="profile-logout" @click="logout">退出</div>
                                </div>
                            </div>
                            <!--用户未登录: 提示用户登录-->
                            <div class="userPhoto" v-else @click.prevent="login">
                                <a href="">登录/注册</a>
                            </div>

                            <!-- 动态 -->
                            <div class="navbar-btn navbar-btn-dynamic navbar-fl">
                                <a href="">动态</a>
                            </div>
                            <!-- 消息 -->
                            <div class="navbar-btn navbar-btn-news navbar-fl">
                                <a href="">消息</a>
                            </div>

                            <!-- 发布 -->
                            <div class="navbar-btn navbar-btn-write navbar-fl">
                                <a class="write" @click="write">
                                    <i ></i>发布
                                    <i ></i></a>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        <div>
            <div>
                <router-view></router-view>
            </div>
        </div>
    </div>

</template>

<script>

    export default {
        name: "BBSHeader",
        data(){
            return{
                opacity: 1,
                display: 'none',
                isLogin: false,
                user:JSON.parse(window.sessionStorage.getItem('user'))
            }
        },
        methods:{
            mouseOver(){
                this.opacity = 0
                this.display = 'block'
            },
            mouseLeave(){
                this.opacity = 1
                this.display = 'none'
            },
            transIndex(){
                this.$router.push('/forum')
            },
            login(){
                this.$router.push('/login')
            },
            write(){
                this.$router.push('/write')
            },
            userinfo(){
                this.$router.push('/tabs/'+'1')
            },
            logout(){
                //清空所有缓存
                window.sessionStorage.clear()
                this.$router.replace('/forum')
                location.reload()       //刷新页面
            }
        },
        computed:{
            // 默认头像显示
            portrait(){
                return this.user.portrait == null ? require('../assets/portrait.png') : this.user.portrait
                //return 'this.src="' + require('../assets/portrait.png') + '"';
            },
            username(){
                return this.user.nickname == null ? '京茶吉鹿' : this.user.nickname
            }
        },

        mounted() {
            this.$bus.$on('isLogin',(data)=>{
                this.isLogin = data
            })
            //此处要判断token是否存在，存在则不展示 登录/注册 选项
            if(window.sessionStorage.getItem("tokenStr")){
                this.isLogin = true
            }
        },
        updated() {
            //获取用户信息
            this.getRequest('/user/info').then(resp =>{
                if(resp){
                    window.sessionStorage.setItem('user',JSON.stringify(resp));
                    //location.reload()
                    /*if (location.href.indexOf("#reloaded") == -1) {
                        location.href = location.href + "#reloaded";
                        location.reload();
                    }*/
                }
            })
        }
    }
</script>

<style scoped>
    .navbar{
        position: fixed;
        z-index: 2001;
        top: 0px;
        width: 100%;
        left: 0px;
        font-size: 14px;
        /* 字体粗细，400相当于normal */
        font-weight: 400;
        color: #222226;
        background-color: #fff;
        /*background-color: #292c2f;*/
        /* 阴影  水平阴影距离，垂直阴影距离， 模糊尺寸， 阴影尺寸 颜色*/
        box-shadow:0 2px 4px 0 rgb(0, 0, 0,5%);
    }
    .navbar-container{
        width: 100%;
        /* 最小宽度，窗口缩小之后到1280px不会再缩小 */
        min-width: 1280px;
        box-sizing: border-box;
        padding: 0 24px;
        margin: 0 auto;
        height: 48px;
        line-height: 48px;
        display: flex;
        justify-content: space-between;
        -webkit-box-pack: justify;
    }
    .toolbar-container-left{
        /* 元素会根据自身宽高来设置尺寸。它是完全非弹性的：既不会缩短，也不会伸长来适应 flex 容器 */
        flex: none;
    }
    .logo{
        position: relative;
        float: left;
        margin-right: 8px;
        /* 当箭头鼠标移到会变成手式鼠标 */
        cursor: pointer;
    }
    .logo img{
        width: 80px;
        max-width: 80px;
        height: 44px;
        display: block;
        /* cacl()将img放在盒内的高的中间 */
        margin-top: calc((48px - 44px)/ 2);
    }
    .left-ul{
        width: auto;
        height: 100%;
        /* 去除li中的间隙，在li中要设置font-size,否则没有内容 */
        font-size: 0px;
        float: left;
    }
    .left-ul li{
        position: relative;
        display: inline-block;
        font-size: 14px;
        height: 100%;
        line-height: 48px;
    }

    .left-ul li a{
        color: #000;
        padding: 0 20px;
        text-decoration:none;
        font:16px Arial, Helvetica, sans-serif;
        /*font: normal 28px Cookie, Arial, Helvetica, sans-serif;*/
        opacity: 0.9;
    }
    /* 鼠标停留时的样式 */
    .left-ul li:hover{
        background-color: #eee;
    }
    .left-ul li a:hover {
        opacity: 1;
    }
    /*选中的样式*/
    .left-ul li a.active {
        color: skyblue;
        pointer-events: none;
        opacity: 1;
    }

    a{
        color:#000;
        padding: 0 10px;
        font:16px Arial, Helvetica, sans-serif;
        /* 删除a标签的下划线 */
        text-decoration: none;
    }

    .navbar-container-middle{
        padding: 0 40px;
        flex: 1;
    }
    .navbar-search-container{
        width: 100%;
        max-width: 720px;
        height: 32px;
        line-height: 32px;
        margin-top: calc((48px - 32px)/ 2);
        box-sizing: border-box;
        font-size: 0px;
        margin-left: auto;
        margin-right: auto;

    }
    .navbar-search-container input{
        font-size: 14px;
        display: inline-block;
        width: calc(100% - 88px);
        height: 100%;
        line-height: inherit;
        /* 为了后面聚焦搜索框样式，将边框外围线清除 */
        outline: 0;
        background: #f5f6f7;
        color: #222226;
        vertical-align: top;
        text-indent: 16px;
        border: 1px solid #e8e8ed;
        border-right: none;
        box-sizing: border-box;
        border-radius: 16px 0 0 16px;
    }
    /* 搜索框聚焦样式 */
    .navbar-search-container input:focus{
        border: 1px solid skyblue;
        border-right: none;
    }
    .navbar-search-container button{
        display: inline-block;
        width: 88px;
        height: 100%;
        outline: 0;
        border: 0 none;
        border-radius: 0 16px 16px 0;
        font-size: 14px;
        line-height: 32px;
        cursor: pointer;
        background-color: skyblue;
        text-align: left;
    }
    .navbar-search-container i{
        display: inline-block;
        width: 24px;
        height: 24px;
        background: url(https://g.csdnimg.cn/common/csdn-toolbar/images/csdn-white-search.png) no-repeat center center;
        background-size: 100%;
        vertical-align: middle;
        position: relative;
        top: -1px;
        margin-left: 14px;
    }
    .navbar-search-container span{
        display: inline-block;
        vertical-align: top;
        color: #fff;
    }
    .navbar-btns-User{
        flex: 1;
    }

    .profile-fans{
        display: flex;
        flex-direction: column;
        border-bottom: 1px solid #e8e8ed;
    }
    .profile-fans ul{
        display: flex;
        flex-direction: row;
        width: 100%;
        margin: 4px 0;
    }
    .profile-fans ul li{
        position: relative;
        display: inline-block;
        width: 33.333%;
        line-height: 26px;
    }
    .profile-fans ul li:hover{
        cursor: pointer;
    }
    .profile-fans ul li p{
        font-size: large;
    }

    .profile-personal{
        border-bottom: 1px solid #e8e8ed;
    }
    .profile-personal ul{
        width: 100%;
        line-height: 30px;
        margin: 10px 0px;
    }
    .profile-personal ul li{
        position: relative;
        display: inline-block;
        width: 50%;
    }
    .profile-personal ul li:hover{
        cursor: pointer;
        background-color: #eee;
    }
    .profile-logout:hover{
        cursor: pointer;
        background-color: #eee;
    }
    .userPhoto{
        height: 100%;
        float: left;
        position: relative;
        line-height: 48px;
        text-align: center;
        padding: 0 8px;
    }
    .hasAvatar{
        display: block;
        line-height: 48px;
        color: #222226;
        margin-top: calc((48px - 32px)/ 2);
        margin-right: 16px;
        opacity: 1;
    }
    .hasAvatar img{
        width: 32px;
        height: 32px;
        border-radius: 50%;
    }
    .navbar-profile{
        width: 248px;
        color: #222226;
        background: #fff;
        position: absolute;
        min-height: 200px;
        top: 48px;
        left: 50%;
        margin-left: -132px;
        z-index: 9999999;
        border-radius: 4px;
        box-shadow: 0 0 10px 2px rgb(0 0 0 / 6%);
    }
    .navbar-profile .profile-user{
        text-align: center;
        padding: 20px 0 12px 0;
        border-bottom: 1px solid #e8e8ed;
    }
    .navbar-profile .profile-user .profile-avatar{
        position: absolute;
        width: 48px;
        height: 48px;
        padding: 0px;
        top: -32px;
        left: 50%;
        -webkit-transform: translate(-50%,0);
        transform: translate(-50%,0);
        border-radius: 50%;
        cursor: pointer;
        z-index: 9999;
        border: 1px solid #e8e8ed;
    }
    .profile-user .profile-avatar img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
    }
    .navbar-profile .profile-user .profile-nickName{
        width: 100%;
        box-sizing: border-box;
        padding: 0 16px;
        font-size: 16px;
        color: #222226;
        font-weight: 500;
        height: 40px;
        line-height: 40px;
        text-overflow: ellipsis;
        white-space: nowrap;
        overflow: hidden;
    }
    .navbar-btn{
        position: relative;
        height: 48px;
        line-height: 48px;
        color: inherit;
        text-align: center;
        padding: 0 8px;
    }
    .navbar-fl{
        float: left;
    }
    .navbar-btn-write>a i:first-child{
        display: inline-block;
        width: 20px;
        height: 20px;
        vertical-align: middle;
        /*background: url(https://img-home.csdnimg.cn/images/20201218055848.png) no-repeat -38px -20px;*/
        background: url("../assets/write.png");
        background-size: 100%;
        margin-right: 2px;
    }
    .navbar-btn-write>a i:last-child{
        display: inline-block;
        background: 0 0;
        width: 10px;
        height: 7px;
        margin-left: 7px;
        vertical-align: middle;
        background: url(https://g.csdnimg.cn/common/csdn-toolbar/images/write-hover-thro.png) no-repeat center center;
        background-size: 100%;
    }
    .write{
        display: block;
        min-width: 88px;
        height: 32px;
        line-height: 32px;
        text-align: center;
        color: #fff;
        background: skyblue;
        border-radius: 20px;
        margin-top: calc((48px - 32px)/ 2);
    }
    .write:hover{
        cursor: pointer;
    }

</style>
